Vehicle System Testing and Adjusting 53
Mast and Carriage
Mast Adjustment
NOTE: The Standard, Full Free Lift and Full Free
Triple Lift mast load bearings are all adjusted the
same way. The mast shown in the following
illustrations is the Full Free Triple Lift mast.
To make the mast clearance adjustments, mast
must be removed from the lift truck.
Carriage, chain and lift cylinder must be removed
from the mast for easy adjustments.
Use the procedure that follows to adjust the load
bearings.
A. Lower Bearing Adjustment of Intermediate Mast
Mast Adjustment Lower Bearings
(A) Zero clearance. (B) Minimum clearance. (C) Zero
clearance.(3) Bearing. (4) Bearing. (5) Shims. (6) Shims.
1. Select lower bearings (3) and (4) from the chart to
obtain minimum clearance (B) between bearing
and channel leg for full channel length. Use same
bearing on left and right side.
Mast And Carriage Bearings
Part No. Bearing Size Bearing O.D.*
D581814 Under Size 108.6 mm (4.276 in)
D581815 Standard 109.6 mm (4.135 in)
D581816 Over Size 110.7 mm (4.358 in)
*Permissible tolerance ±0.08mm (.003in)
2. Find narrowest point by ruler on the stationary
mast in the area where the bearings make contact
at 475 mm (18.7 in) channel lap.
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